An Englishman, a Frenchman, and a Pole walk into a bar. The first two do something playing to the stereotypes of their countries and the the last one embarasses his nationality by doing or saying something stupid.
Anti-humor is a type of indirect humor that involves the joke-teller delivering something which is deliberately not funny, or lacking in intrinsic meaning. The practice relies on the expectation on the part of the audience of something humorous, and when this does not happen, the irony itself is of comedic value.